commit 8758eb80ff7cdd7ef1f5642d8da327050691ab77
Author: Imre Deak <imre.deak@intel.com>
Date:   Thu Jan 29 14:32:24 2015 -0800

    gem_render_copy: check whole dst area

    Signed-off-by: Imre Deak <imre.deak@intel.com>

diff --git a/tests/gem_render_copy.c b/tests/gem_render_copy.c
index 006b6f5..691dcb5 100644
--- a/tests/gem_render_copy.c
+++ b/tests/gem_render_copy.c
@@ -119,6 +119,25 @@ scratch_buf_check(data_t *data, struct igt_buf *buf, int x, int y,
 		     color, val, x, y);
 }

+static void
+scratch_buf_check_area(data_t *data, struct igt_buf *buf, int x, int y,
+		       int w, int h, uint32_t color)
+{
+	int row, col;
+	uint32_t val;
+
+	gem_read(data->drm_fd, buf->bo->handle, 0,
+		 data->linear, sizeof(data->linear));
+	for (row = y; row < y + h; row++) {
+		for (col = x; col < x + w; col++) {
+			val = data->linear[y * WIDTH + x];
+			igt_assert_f(val == color,
+				     "Expected 0x%08x, found 0x%08x at (%d,%d)\n",
+				     color, val, x, y);
+		}
+	}
+}
+
 static int opt_handler(int opt, int opt_index)
 {
 	if (opt == 'd') {
@@ -184,8 +203,10 @@ int main(int argc, char **argv)
 			STRIDE, 0);
 		drm_intel_bufmgr_gem_set_aub_dump(data.bufmgr, false);
 	} else {
-		scratch_buf_check(&data, &dst, 10, 10, DST_COLOR);
-		scratch_buf_check(&data, &dst, WIDTH - 10, HEIGHT - 10, SRC_COLOR);
+		scratch_buf_check_area(&data, &dst, 0, 0, WIDTH / 2, HEIGHT / 2,
+				       DST_COLOR);
+		scratch_buf_check_area(&data, &dst, WIDTH / 2, HEIGHT / 2,
+				       WIDTH / 2, HEIGHT / 2, SRC_COLOR);
 	}

 	igt_exit();